Pretty sure the answer is A!
Characteristics that are always present in living organisms are Metabolism, Cells and Reproduction.
Water freezes as 0º Celsius and 32º Fahrenheit.
I'm not sure what more there is to compare.
Answer:
ok, so if an hiv is a virus that attacks the immune system, how does that affect you?
if your immune system is weak in a moment, bad bacteria can enter your blood and cause problems and weaken your immune system even more.
its really bad for a person's health, it weakens your immune system so your body has a tougher time fighting against a virus.
